You can't compare the two in my opinion, as are totally different things.

Airdrop is something given to you based on what you're holding. Getting an airdrop is not your choice. Discount is an option you can use if you want to as no one is forcing you. Totally different things and can't be compared in my opinion.

I'm here to talk about discounts that often unconsciously spend our money.

I totally disagree. Discounts don't spend your money, you do.